168 HENRY SOTHERAN iS: CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



3358 [NORWOOD (Richard), and Henry BOND:] A Triangular Canon Logarithmicall, or 

 a Table of Artificial! Sines, Tangents, and the Complements Arithmetical! of Sines supplying the 

 use of Secants : To Radius, 10,000 00, and to every Degree and Minute of the Quadrant, 12mo. hf. 

 roan [t imperfect at end) ; RARE, \os W. Leybourn, 1GG4 



3354 NOYES (William Albert, edr. Jl. Amer. Chem.. Soc.) ORGANIC Chemistry for the Labof^\- 

 TORY ; with figures, sq. post 8vo. cL, 3s (p. 6* 6d nett) Easton, Fa., 1897 



3355 NXJIS (Hendrik Jaspar) 't Gebruik van het Rectangulum Catholicum Geometrico- 

 AsTKONOMicuM, ofte Reghthoekig Algemein Meet-en Sterlcundig Plat, verstrelckende voor een 

 Proportionaal-passer, Meetkundig Astrolabium, Algemeine Zonnewyzer, enz. ; with 

 2 folding plates, and numerous ivoodcuts and diagrams, cr. 4to. old white vellum (very fine 

 COPY), 155 Zwolle, 168(3 



Very rare ; unknown to Poggendorff, Brunet, and other bibliographers. Pp. 310-41 contain chapters on Dialling. 



3356 NYSTROM (John W., c.e.) Project of a New System of Arithmetic, "Weight, Measure, 

 and Coins, to be called the Tonal System, with Sixteen to the Base, coloured front, of ' tonal ' 

 measures, and diagrams, roy. 8vo. cl. (scarce), Is Qd Philadelphia, 1862 



a counterblast to d'ecimalisers. The author claims this to be the best of all systems ' for measurement in the shop and 

 market as for calculation, being based on binary multiplication and division '. 



3357 OBACH (Eugene F. A.) Cantor Lectures on Gutta Percha, with 13 plates and numerous 

 other illustrations, imp!. 8vo. sewn, 3s 1898 



3358 O'BRIEN (Charles) The Callico Printers' Assistant; from the first Operation of Designing 

 Patterns, to the Delivery of Work for Sale, with Thoughts on Genius and Invention, Suggestions 

 for an Improved Mode of Printing, etc. etc., and a concise History of Callico Printing: 

 White (J.) Art's Treasury of Rarities, and Curious Inventions, containing tlie Mystery of 

 Dying [sic^ Cloth, Silk, etc., preparing and colouring Skins . . . cementing broken Glass and 

 China, etc." etc. etc., 6th Ed.— 2 vols. 12rao. in 1, old calf gilt {rare), lis Qd 1789— Glasgow, 1773 



3359 O'BRIEN (Matthew, pr., Caius Coll.) Elementary Treatise on the Differential Calculus, 

 in which the Method of Limits is exclusively made Use of, 6 folding plates, Svo. boards, 3s 6d 



Cambridge, 1842 



3360 Mathematical Tracts, Pt. I : on Laplace's Coefficients, the Figure of the Earth, the 



Motion of a Rigid Body about its Center of Gravity, and Precession and Nutation, Svo. sewn, 3s 



ibidem, 1840 



3361 Treatise on Plane Co-ordinate Geometry, Part I [a!! published, containing Right 



Lines, Circles, and Conic Sections] , 5 plates, large 8vo. boards, 3s Qd ibidem, 1844 



A complete set to 1905 : 



3362 OBSERVATORY (The) : a Monthly Review of Astronomy, edited by Sir W. H. M. 

 Christie, f.r.s., E. W. Maunder, H. H. Turner, T. Lewis, and H. P. Mollis, ff.r.a.s., 

 complete from the beginning in 1877 to 1905, with numerous photographic and other plates 

 {including portraits), and woodcuts, 28 vols. Svo. , vv. 1-27 in hf. calf gilt, and v. 28 seivn (nice 

 SET) ; SCARCE, £7- 10* 1877-1905 



3363 Another Set, from 1884 to 1893 (Vols. Vll— XVI), with plates and woodcuts, 10 vols. 



8vo. in 6, hf. roan qilt, £1. Is 1884-93 



3364 ODE (Jacobus, Univ. Utrecht) Principia PHILOSOPHIC Naturalis ; with 42 plates, 2 vols. 

 4to. in 1, old calf {joints cracked), 4s Trajecti, 1726-7 



3365 Another Copy, old calf gilt, with bookplate of Philip ^nd Earl Stanhope, F.R.S., 5.5 



Unknown to Poggendorff. 



3366 ODLING (William, f.r.s., Wai/nfete Prof. Chemistry, Oxon.) Course of Practical 

 Chemistry for Medical Students, post Svo. cl., \s 1854 



3367 Second Edition, woodcuts, post Svo. cl., with Prof. Williamson's auto., \s Gd 1865 



3368 Lectures on Animal Chemistry, post 8vo. cL, with author's inscr. {out of print), 



2s 6d 1868 



3369 Manual of Chemistry, Descriptive and Theoretical, Part I (all published), Svo. 



boards {scarce), 6s 1861 



3370 . Outlines of Chemistry, or Brief Notes of Chemical Facts, post Svo. cl. {out of print), 



3s 6d 1870 



3371 OERSTED (Hans Christian) Experiment A circa Effectum Conflictus Electric! in Acum 

 Magneticam, editio princeps, 4to. boards (very rare), Hafnice, 1820 



This classic work contains the author's discovery of electro-magnetism, the starting-point of electrical engineering. 

 ' Oersted showed that a magnet tends to set itself at right angles to a wire carrying an electric current. He also found 

 that the way in which the needle turns, whether to the right or to the left of its usual position, dejiends upon the position 

 f.f the wire that carries the current -whether it is above or below the needle— and on the direction in which the current 

 flows through the wire.' — Prof. Silvaniis Thompson. 



3372 OHM (Georg Simon) Die Galvanische Kette, mathematisch bearbeitet ; original 

 edition, with plate, post Svo. boards (rare), 15* Berlin, 1827 



This work first contains one of the most important discoveries in electrical science, now known asO/im'« Law-the basis 

 ol the present system of electrical measurements. , 



3373 Theorie Mathematique des Courants Electriques : Traduction, Preface et Notes 



par J. M. Gaugin ; with diagrams, Svo. hf. brown calf gilt {nice copy) ; scarce, 10s Qd 1860 



The first French translation of the above work. 



3374 OPPOLZER (Theodor Ritter v.; Univ. Vienna) Lehrbuch zur Bahnbestimmung der 

 Kometen und Planeten (Bd. I, 2. vollig umgearbeitete AuHage), 2 vols. imp!. Svo. in 1, hf. 

 morocco gilt, uncut (very scarce), £7. 10s Leipzig, 1882-80 



Last edition of this important work, the most complete treatise ever issued on the calculation of the courses of 

 comets and planets, representing a wholly new treatment of the subject, and suggesting numerous improvements in the 

 methods hitherto pursued. 



